Mark red nodes that returns unspecified keys on the /health page

[dapi]

Mark red nodes that returns unspecified keys on the /health page.

Scheme of requested and responded data and formats must be specified here - https://github.com/zold-io/papers

[0crat]

@yegor256/z please, pay attention to this issue

[0crat]

@dapi/z this project will fix the problem faster if you donate a few dollars to it; just click here and pay via Stripe, it's very fast, convenient and appreciated; thanks a lot!